9326a118c7
This PR integrates witness-enabled block production, witness-creating
payload execution and stateless cross-validation into the `engine` API.
The purpose of the PR is to enable the following use-cases (for API
details, please see next section):
- Cross validating locally created blocks:
- Call `forkchoiceUpdatedWithWitness` instead of `forkchoiceUpdated` to
trigger witness creation too.
- Call `getPayload` as before to retrieve the new block and also the
above created witness.
- Call `executeStatelessPayload` against another client to
cross-validate the block.
- Cross validating locally processed blocks:
- Call `newPayloadWithWitness` instead of `newPayload` to trigger
witness creation too.
- Call `executeStatelessPayload` against another client to
cross-validate the block.
- Block production for stateless clients (local or MEV builders):
- Call `forkchoiceUpdatedWithWitness` instead of `forkchoiceUpdated` to
trigger witness creation too.
- Call `getPayload` as before to retrieve the new block and also the
above created witness.
- Propagate witnesses across the consensus libp2p network for stateless
Ethereum.
- Stateless validator validation:
- Call `executeStatelessPayload` with the propagated witness to
statelessly validate the block.
*Note, the various `WithWitness` methods could also *just be* an
additional boolean flag on the base methods, but this PR wanted to keep
the methods separate until a final consensus is reached on how to
integrate in production.*
---
The following `engine` API types are introduced:
```go
// StatelessPayloadStatusV1 is the result of a stateless payload execution.
type StatelessPayloadStatusV1 struct {
Status string `json:"status"`
StateRoot common.Hash `json:"stateRoot"`
ReceiptsRoot common.Hash `json:"receiptsRoot"`
ValidationError *string `json:"validationError"`
}
```
- Add `forkchoiceUpdatedWithWitnessV1,2,3` with same params and returns
as `forkchoiceUpdatedV1,2,3`, but triggering a stateless witness
building if block production is requested.
- Extend `getPayloadV2,3` to return `executionPayloadEnvelope` with an
additional `witness` field of type `bytes` iff created via
`forkchoiceUpdatedWithWitnessV2,3`.
- Add `newPayloadWithWitnessV1,2,3,4` with same params and returns as
`newPayloadV1,2,3,4`, but triggering a stateless witness creation during
payload execution to allow cross validating it.
- Extend `payloadStatusV1` with a `witness` field of type `bytes` if
returned by `newPayloadWithWitnessV1,2,3,4`.
- Add `executeStatelessPayloadV1,2,3,4` with same base params as
`newPayloadV1,2,3,4` and one more additional param (`witness`) of type
`bytes`. The method returns `statelessPayloadStatusV1`, which mirrors
`payloadStatusV1` but replaces `latestValidHash` with `stateRoot` and
`receiptRoot`.
81 lines
3.7 KiB
Go
81 lines
3.7 KiB
Go
// Copyright 2024 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package core
|
|
|
|
import (
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/common/lru"
|
|
"github.com/ethereum/go-ethereum/consensus/beacon"
|
|
"github.com/ethereum/go-ethereum/consensus/ethash"
|
|
"github.com/ethereum/go-ethereum/core/state"
|
|
"github.com/ethereum/go-ethereum/core/stateless"
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
"github.com/ethereum/go-ethereum/core/vm"
|
|
"github.com/ethereum/go-ethereum/log"
|
|
"github.com/ethereum/go-ethereum/params"
|
|
"github.com/ethereum/go-ethereum/trie"
|
|
"github.com/ethereum/go-ethereum/triedb"
|
|
)
|
|
|
|
// ExecuteStateless runs a stateless execution based on a witness, verifies
|
|
// everything it can locally and returns the state root and receipt root, that
|
|
// need the other side to explicitly check.
|
|
//
|
|
// This method is a bit of a sore thumb here, but:
|
|
// - It cannot be placed in core/stateless, because state.New prodces a circular dep
|
|
// - It cannot be placed outside of core, because it needs to construct a dud headerchain
|
|
//
|
|
// TODO(karalabe): Would be nice to resolve both issues above somehow and move it.
|
|
func ExecuteStateless(config *params.ChainConfig, block *types.Block, witness *stateless.Witness) (common.Hash, common.Hash, error) {
|
|
// Sanity check if the supplied block accidentally contains a set root or
|
|
// receipt hash. If so, be very loud, but still continue.
|
|
if block.Root() != (common.Hash{}) {
|
|
log.Error("stateless runner received state root it's expected to calculate (faulty consensus client)", "block", block.Number())
|
|
}
|
|
if block.ReceiptHash() != (common.Hash{}) {
|
|
log.Error("stateless runner received receipt root it's expected to calculate (faulty consensus client)", "block", block.Number())
|
|
}
|
|
// Create and populate the state database to serve as the stateless backend
|
|
memdb := witness.MakeHashDB()
|
|
db, err := state.New(witness.Root(), state.NewDatabase(triedb.NewDatabase(memdb, triedb.HashDefaults), nil))
|
|
if err != nil {
|
|
return common.Hash{}, common.Hash{}, err
|
|
}
|
|
// Create a blockchain that is idle, but can be used to access headers through
|
|
chain := &HeaderChain{
|
|
config: config,
|
|
chainDb: memdb,
|
|
headerCache: lru.NewCache[common.Hash, *types.Header](256),
|
|
engine: beacon.New(ethash.NewFaker()),
|
|
}
|
|
processor := NewStateProcessor(config, chain)
|
|
validator := NewBlockValidator(config, nil) // No chain, we only validate the state, not the block
|
|
|
|
// Run the stateless blocks processing and self-validate certain fields
|
|
res, err := processor.Process(block, db, vm.Config{})
|
|
if err != nil {
|
|
return common.Hash{}, common.Hash{}, err
|
|
}
|
|
if err = validator.ValidateState(block, db, res, true); err != nil {
|
|
return common.Hash{}, common.Hash{}, err
|
|
}
|
|
// Almost everything validated, but receipt and state root needs to be returned
|
|
receiptRoot := types.DeriveSha(res.Receipts, trie.NewStackTrie(nil))
|
|
stateRoot := db.IntermediateRoot(config.IsEIP158(block.Number()))
|
|
return stateRoot, receiptRoot, nil
|
|
}
|